PPRuNe Forums - View Single Post - Something Whining over EGDM/SPTA

18th Jun 2014, 06:12

#16 (permalink)

TCAS FAN

Join Date: Apr 2005

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MOSTAFA

From what has been described it is most probably a Watchkeeper UAS. The annoying noise is not generated by the engine but by the prop tips. The engine operates at such high revolutions that the prop tips are close to the speed of sound.

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